"With measured service uptime of four nines (99.99 percent), and designed data durability of 11 nines (99.999999999 percent), the service is trustworthy for mission-critical data," Matthew Soldo, a Heroku engineer, wrote in a blog post. "As of today, these production-quality Heroku Postgres databases are independently available for use from any cloud platform, provisioned instantly, metered by the second, and without contract."